table {
    margin: auto;
}

table, td {
    border: 1px solid #78C3F3;
    padding: 2px;
}

.a-upload {
    position: relative; /*绝对定位!*/
    display: inline-block; /*设置为行内元素*/
    background: #D0EEFF;
    border: 1px solid #99D3F5;
    border-radius: 4px;
    padding: 4px 12px;
    overflow: hidden;
    color: #1E88C7;
    text-decoration: none;
    text-indent: 0;
    line-height: 20px;
}

.a-upload input {
    position: absolute; /*相对定位*/
    right: 0;
    top: 0;
    opacity: 0; /*将上传组件设置为透明的*/
}

.a-upload :hover {
    background: #AADDFF;
    border-color: #78C3F3;
    color: #004974;
    text-decoration: none;
    cursor: pointer; /*显示手型*/
}